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Characterization of dehydration-induced luminescence of kaoliniteThe dehydration-induced luminescence of a colloidal kaolinite is investigated experimentally, with particular attention given to the effect of various treatments on the luminescence characteristics. It is found that the total photon count of the emitted light is linearly related to the film thickness up to a thickness of 30 microns; mechanical stress in the form of grinding increases the photon output and produces extensive changes in the emission kinetics. A direct check of the emission wavelength dependence (by using color filters) indicates that roughly 75 percent of the emission occurs in the wavelength range below 410 nm. It is also found that incorporation of fluorescent molecules into the kaolinite paste increases the photon output and may indicate the transfer of ultraviolet photons to the fluorescent probe.
Document ID
19850066344
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lahav, N.
(NASA Ames Research Center Moffett Field, CA, United States)
Coyne, L.
(NASA Ames Research Center Moffett Field, CA, United States)
Lawless, J. G.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Clays and Clay Minerals
Volume: 33
Issue: 3, 19
ISSN: 0009-8604
Subject Category
Geosciences (General)
Accession Number
85A48495
Distribution Limits
Public
Copyright
Other

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